Question

Al desarrollar (4 − 7) 2 se obtiene

Answer 1

$(4 - 7) {}^{2} = (4) {}^{2} + 2(4)( - 7) + {7}^{2} \\ 16 - 56 + 49 = 65 - 56 = 9$

$(4 - 7) { }^{2} = ( - 3) {}^{2} = 9$

Answer 2

respuesta

(4−7)

2

=(4)

2

+2(4)(−7)+7

2

16−56+49=65−56=9

(4 - 7) { }^{2} = ( - 3) {}^{2} = 9(4−7)

2

=(−3)

2

=9